1986 Ford Mustang 5.0 SFI Wiring Diagram 111A - Fuel Injectors & ECA Pinout

This is page 111A of a Ford factory wiring diagram set, covering the Electronic Engine Control system for the 8-cylinder SFI (sequential fuel injection) engine. The diagram shows power distribution from the Electronic Engine Control circuit (continued from page 110 via connector HH) on circuit 361 (red wire), branching through splices S153, S154, and S155 to feed eight fuel injectors, the canister purge solenoid, a diode, and the idle speed actuator. Each fuel injector's return wire is identified by circuit number and color: injector 1 (555 T, ECA pin 58), injector 2 (556 T/W, pin 59), injector 3 (557 T/Y, pin 12), injector 4 (558 T/BK, pin 13), injector 5 (559 T/LB, pin 14), injector 6 (560 T/LG, pin 15), injector 7 (561 T/O, pin 42), and injector 8 (562 T/R, pin 52). The canister purge solenoid returns on circuit 101 GY/Y through connector C190 to ECA pin 31, while the diode and idle speed actuator share circuit 264 W/LB through splice S138 and connector C191 to ECA pin 21. All circuits terminate at the solid-state Electronic Control Assembly (ECA). This page is useful for tracing injector wiring, connector locations (C190/C191), and ECA pinouts on the 5.0L SFI engine.